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(No Model.) 2 Sheets-Sheet 1. J. M. CLOCK. GRINDSTONE ATTACHMENT.

No. 498,623. Patented May 30, 1893.

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(No Model .3 2*Sheets-Sheet 2i J.M.OLOGK. GRINDSTONE ATTACHMENT.

No. 498,623. Patented May 30, 1893.

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UNITED STATES PATENT FFICE.

JESSE M. CLOCK, OF NEW YORK,,N. Y.

GRINDSTONE ATTACHMENT.

SPECIFICATION forming part Of Letters Patent NO. 498,623, dated May 30, 1 893.

Applioationfiled February 6, 1893. Serial No. 461,157. (No model.)

To all whom it may concern.-

Be it known that I, JESSE M. CLooK, of New York city, in the county and State of New York, have invented a new and Improved Grindstone Attachment, of which the following is a full, clear, and exact description.

My invention relates to improvements in grindstone attachments, and the object of my invention is to provide a grindstone with a treadle mechanism by which it may be easily turned by foot power, to arrange the water tank of the stone and attachments for the tank in such a way that the stone may be kept thoroughly wet, but will be prevented from spraying water upon the person using it, and also to provide attachments by which certain peculiar knives, such as the knivesin the cutter-bar of a mowing machine, may be readily ground and on a true bevel.

To this end, my invention consists in certain features of construction and combinations of parts, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of a grindstone provided with my improved attachments. Fig. 2 is an end view of the same. Fig. 3 is a vertical section on the line 33 in Fig. 2. Fig. 4 is a broken enlarged cross section through the stone, and shows in detail the wator-collecting collars on the sides of the stone; and Fig. 5 is a broken plan view, showing the water-collecting collars and the water guard on the front face of the stone.

The grindstone 10 may be of any kind whatever, and it is carried bya shaft 11 arranged in the usual way, and journaled on a bench 12, which has supporting legs 13. The shaft has a crank 14, at one end, to which is attached a pitman 15, the lower end of which is pivoted to a treadle lever 16, this extending in a substantially horizontal position on one side of the machine, being pivoted at one end, as shown at 17, to one of the bench legs, and held at the other end to slide vertically between one of the legs 13 and a guide rail 18, which is secured to the leg. The treadle lever is held raised by a link 16 and a spring 16", the link connecting the spring and lever,

and the spring being secured at one end to one of the legs 13. On the under side of the lever 16 are staples 19, adapted to engage a hook 20 on one end of the treadle 21, which extends beneath the bench 12 and essentially at right angles to the lever 16, the treadle having at its lower end a head 22, on opposite sides of which are journaled the trucks or rollers 23, which run upon the floor or ground and which enable the treadle to move easily back and forth as it rises and falls in connection with the lever 16. described enables the stone to be turned from either side of the bench, as, if desired, the operator may place his foot on the lever 16 and This arrangementjust I use that as a treadle, butit may be more easily operated by using the treadle 21, and it will be observed that the spring 16 acts in the nature of a counterbalance and effects the easy upward movement of the treadle. The lower portion of the stone 10 turns in a tank 24., which is supported on the bench 12, and the front end of the tank extends above the bench top, as shown at 25, and in'this raised portion of the tank is held a downwardly-inclined guard block 26, which is preferably of wood or some other relatively soft and partially absorbent material, and this block is held in place by a screw 27 extending through a slot 28 at right angles to the axis of the grindstone, and into the front portion of the tank. This construction enables the block to be adjusted in and out in relation to the stone so that its inner face may be held close to or upon the stone and thus prevent water from being carried up by the stoneand being thrown upon the operator. The throwing of water is further guarded against by the collars 28, which are arranged on the shaft 11 on opposite sides of the grindstone, and which have grooved faces or edges so that the water which runs down the sides of the stone isgathered by'the collars and carried to the under side, where it drops back into the tank. On the bench 12 and on opposite sides of the stone are brackets 29, which extend upward above the stone and which are provided on theirinner sides with longitudinal and nearly vertical slide-ways 30, in which are held cross pieces 31 and 32, adapted to clamp between 3, so that the latter may be ground perfectly upon the stone. This construction is substantially similar to that shown in Letters Patent of the United States, No. 476,872, dated June 14, 1892; the cross piece 32, however, has a new feature in the forwardly-extending ledge 32, which prevents any water from rising upward above the block.

The brackets 29 are provided with slots 33 and 34, arranged one above another, and the upper of these slots receive a cross brace or bolt 35, which strengthens the brackets, and this may be placed if desired in the lower slots. The important feature of the brackets is the series of notches 36 in the front edge of each, these notches having their upper Walls 37 inclined upward and inward, as shown in Fig. 2, and consequently, a cutter-bar 38 may be held diagonally in the notches of the opposite brackets so as to bring the edges of its knives one by one upon the stone near one side, and the bar may thus be held rigidly in place and the bevel of each knife will be true, and thebevels of the knives will all be alike.

The grindstone is turned by simply pressing repeatedly upon the treadle 21 and permitting the treadle after each pressure to rise by the movement of the crank and the connected pitman. When the stone is turned it iskept moist by passing through the tank 24, and the block 26 prevents any great quantity of water from being carried upward with the stone, while the collars 28 and the ledge 32 serve tofurther shield the operator, and consequently the stone may be operated without throwing any water whatever from its face.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination of the revoluble grindstone, the tank enveloping the lower portion of the stone, and the grooved collars secured on opposite sides of the stone, substantially as described.

2. The combination of the revoluble grindstone, the tool-holding brackets arranged on opposite sides of the stone and projecting above the same, the cross bar connecting the brackets above the stone, and the forwardlyprojecting ledge on. the cross bar, substantially as described. 7

3. The combination, with the revoluble grindstone, of brackets arranged on opposite sides of the stone and projecting above the same, said brackets having notches in their edges to receive a tool, substantially as described.

4:. The combination, with the grin dstone, of the brackets arranged on opposite sides of the stone and projecting above it, each bracket having a series of notches in one edge, the

. upper walls of the notches being inclined upward and inward, substantially as described.

JESSE M. CLOCK.

Witnesses: WARREN B. HUTOHINSON, O. SEDewIo 

